Noting a macOS 15 Beta 3 crash

[ZachNagengast]

We're working through MLX support over in WhisperKit and noticed a crash that happens on macOS 15 but not 14. It occurs on this particular test, oddly many of the other tests still pass.

How to replicate:

git clone https://github.com/argmaxinc/WhisperKit.git
cd WhisperKit
git checkout mlx-support
make setup
make download-mlx-models
xcodebuild test -only-testing WhisperKitMLXTests/MLXUnitTests -scheme whisperkit-Package -destination "platform=macOS"

Or to run them in xcode,

xed .

And open up the tests, then run the MLXUnitTests suite, particularly testEncoderOutput

This throws the following assert:

template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20 inline _LIBCPP_HIDE_FROM_ABI typename vector<_Tp, _Allocator>::const_reference
vector<_Tp, _Allocator>::operator[](size_type __n) const _NOEXCEPT {
  _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__n < size(), "vector[] index out of bounds");
  return this->__begin_[__n];
}

Where __n is 3 and I cant tell what size() is but I would assume less than or equal to 3.

[awni]

This is probably a dup of #104, which is fixed in MLX core and should be picked up in swift in the next release (week or so).

[ZachNagengast]

Ah great, will use -configuration Release in the meantime.